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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 982 (Automatic Transaxle - AF33-5 (DTC P0562 - P0762)) >> Diagnostic Information & Procedures >> DTC P0730 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The transmission control module (TCM) calculates gear ratio based on data from the transmission input shaft speed (ISS) and output shaft speed (OSS) sensors. The TCM compares the calculated gear ratio to the known gear ratio for each commanded gear.

If the TCM detects an incorrect 1st gear ratio while decelerating in LOW (L), indicating no engine braking within the transmission, then DTC P0730 sets. DTC P0730 is a type A DTC.

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